Does the quality of legislation impact the chance of ending up before the Belgian Constitutional Court?

A system of constitutionality review is provided for in several countries. This ensures that even parliamentary acts remain within the boundaries of the constitution. Therefore, an important question is how the decision-making procedure can be organized in such a way that legal proceedings are avoided and, if they take place, the law passes the constitutionality test. It seems obvious that an ex ante legal test by an independent legal body would be a good guarantee. However, in order to safeguard the autonomy of parliament, such a ruling often has only advisory value. This implies that the success of such programs depend on the value given to it by politicians. An elaborated empirical research with a focus on Flanders will examine whether ex ante advisory opinions are able to signal red flags about the constitutionality of the present law.